Duct back structure of aeolian sand flow-state soil

Abstract

The culvert back structure comprises a culvert, left natural gravel and right natural gravel are stacked on the two sides of the culvert respectively, and a filling layer is arranged in the space, outside the culvert, between the left natural gravel and the right natural gravel; the filling layer is formed by filling aeolian sand fluidized soil; and a roadbed is paved on the left natural gravel, the filling layer and the right natural gravel. The culvert back structure is optimally designed, structure layering and bearing are particularly optimized, and independence and stability of all construction sections are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil mechanics and engineering geology, and particularly relates to a wind-sand flow state soil culvert back structure. BACKGROUND

[0002] The current culvert back filling structure has insufficient structural stability, especially under complex topographic or geological conditions, uneven settlement or local uplift of the roadbed is prone to occur, thereby affecting driving safety. SUMMARY

[0003] In view of the above problems, the present application provides a wind-sand flow state soil culvert back structure to solve the problem of insufficient structural stability of the current culvert back filling structure, especially under complex topographic or geological conditions, uneven settlement or local uplift of the roadbed is prone to occur, thereby affecting driving safety.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] The utility model discloses a wind-sand flow state soil culvert back structure, including a culvert, the both sides of culvert respectively have left natural sand and right natural sand, the space of the culvert outside between left natural sand and right natural sand is provided with filling layer;

[0006] The filling layer is filled with wind-sand flow state soil;

[0007] The left natural sand, the filling layer and the right natural sand are paved with a roadbed.

[0008] Preferably, the bottom plate is arranged under the culvert, and the left wall body and the right wall body are arranged on the both sides of the culvert;The culvert is covered with a cover plate, and the both ends of the cover plate are arranged on the left wall body and the right wall body;

[0009] The bottom plate, the left wall body, the right wall body and the cover plate jointly enclose the culvert.

[0010] Preferably, a left foam baffle is arranged between the left wall body and the filling layer;

[0011] A right foam baffle is arranged between the right wall body and the filling layer.

[0012] Preferably, the connection between the filling layer and the left natural sand and the connection between the filling layer and the right natural sand are connected by arranging steps respectively.

[0013] Preferably, the steps are arranged on the left natural sand or the right natural sand, and are compacted soil steps.

[0014] Preferably, the step portion of the step is graded towards the left natural gravel or the right natural gravel.

[0015] Preferably, the grade of the step portion of the step is 2%.

[0016] Preferably, all the outer end points of the step section are located on the same straight line, and the extension of the oblique line formed by the connecting line of all the outer end points of the step section is not less than 100 cm from the intersection point of the step portion of the bottom layer of the step to the bottom plate.

[0017] Preferably, the thickness of the filling layer between the cover plate and the roadbed is not less than 60 cm.

[0018] Compared with the prior art, the present application has the beneficial effects that:

[0019] The utility model discloses a kind of aeolian sand fluid soil's culvert back structure, including a culvert, left natural gravel and right natural gravel are respectively accumulated in the two sides of culvert, and the space outside culvert between left natural gravel and right natural gravel is provided with filling layer;Filling layer is filled by aeolian sand fluid soil;Left natural gravel, filling layer and right natural gravel are paved with roadbed on top. Since aeolian sand fluid soil filling is used as filling layer, the physical characteristics and mechanical properties of fluid soil are utilized, structural stability and bearing capacity are improved, and foundation is laid for the wide application of aeolian sand fluid soil's culvert back structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the schematic diagram of the cross section of the aeolian sand fluid soil culvert back backfill structure provided by the utility model embodiment 1;

[0021] Figure 2 It is Figure 1 Local enlarged view of step in " among.

[0022] Reference signs: 100-culvert,

[0023] 10-bottom plate, 110-left foam baffle, 11-left wall, 120-right foam baffle, 12-right wall, 13-cover plate;

[0024] 2-filling layer;

[0025] 31-left natural gravel, 32-right natural gravel,

[0026] 4-roadbed. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it is to be understood that the application is not limited to the embodiments described herein, which are presented as examples. Rather, the present application is intended to cover all modifications of this application within the scope and spirit of the present application. Furthermore, where a diacritical term is necessary to distinguish, for example, a generic class name from a specific subclass name, the diacritical term is presented alone or in capital letters, not by the addition of an asterisk or an apostrophe to the class name.

[0028] Embodiment 1

[0029] The utility model discloses an aeolian sand flow state soil's back structure of culvert, below combining with the drawing to its structure detailed description.

[0030] Reference Figure 1 The aeolian sand flow state soil's back structure of culvert 100, including

[0031] Bottom plate 10 set in the below of culvert 100;

[0032] Left wall body 11 and right wall body 12, separate the both sides of culvert 100;

[0033] Cover plate 13, cover set in the above of culvert 100, and its both ends are set on left wall body 11 and right wall body 12 respectively;Wherein, bottom plate 10, left wall body 11 and right wall body 12 and cover plate 13 jointly enclose culvert 100;

[0034] The both sides of culvert 100 respectively have left natural sand and gravel 31 and right natural sand and gravel 32, and the space outside culvert 100 between left natural sand and gravel 31 and right natural sand and gravel 32 is provided with filling layer 2;

[0035] Left natural sand and gravel 31, filling layer 2 and right natural sand and gravel 32 are paved with roadbed 4 on top.

[0036] Specifically, filling layer 2 is filled with aeolian sand flow state soil.

[0037] In order to prevent the aeolian sand flow state soil of filling layer 2 from eroding left wall body 11 and right wall body 12, left foam baffle 110 is arranged between left wall body 11 and filling layer 2, and right foam baffle 120 is arranged between right wall body 12 and filling layer 2.

[0038] In order to improve the strength of the joint between filling layer 2 and natural sand and gravel, the connection between filling layer 2 and left natural sand and gravel 31 and the connection between filling layer 2 and right natural sand and gravel 32 are connected by setting steps 20 respectively.

[0039] Specifically, the step 20 is a compacted soil step.

[0040] In order to drain the rainwater on the roadbed 4 to the left natural gravel 31 and the right natural gravel 32 on both sides, the step part of the step 20 is sloped towards the left natural gravel 31 or the right natural gravel 32.

[0041] Specifically, the slope of the step part of the step 20 is 2%, as shown in Figure 2 .

[0042] As a specific embodiment, all the outer end points of the cross section of the step 20 are located on the same straight line, and the extension line of the inclined line formed by the connecting line of all the outer end points of the cross section of the step 20 is not less than 100 cm from the intersection point of the step part of the bottom layer of the step 20 to the bottom plate 10.

[0043] As a specific embodiment, the thickness of the filling layer 2 between the cover plate 13 and the roadbed 4 is not less than 60 cm.

[0044] The utility model embodiment 1 has carried out the optimal design to the culvert back structure according to the topographic feature and geological condition, especially optimizes the layered structure and bearing, and ensures the independence and stability of each construction section.

[0045] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it still can modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A culvert backing structure for aeolian sand-fluid soil, characterized in that, Includes a culvert (100). The culvert (100) has left natural gravel (31) and right natural gravel (32) piled on both sides respectively, and the space outside the culvert (100) between the left natural gravel (31) and the right natural gravel (32) is filled with a filling layer (2). The filling layer (2) is composed of aeolian sand fluid soil; The roadbed (4) is laid on the left natural gravel (31), the filling layer (2) and the right natural gravel (32).

2. The culvert back structure of aeolian sand-fluid soil according to claim 1, characterized in that, A bottom plate (10) is provided below the culvert (100). The culvert (100) is provided with a left wall (11) and a right wall (12) on both sides respectively. The culvert (100) is covered with a cover plate (13), and the two ends of the cover plate (13) are respectively set on the left wall (11) and the right wall (12); The base plate (10), the left wall (11), the right wall (12), and the cover plate (13) together form the culvert (100).

3. The culvert backing structure of aeolian sand-fluid soil according to claim 2, characterized in that, A left foam baffle (110) is provided between the left wall (11) and the filling layer (2). A right foam baffle (120) is provided between the right wall (12) and the filling layer (2).

4. The culvert backing structure of aeolian sand-fluid soil according to claim 3, characterized in that, The connection between the filling layer (2) and the left natural gravel (31) and the connection between the filling layer (2) and the right natural gravel (32) are respectively connected by steps (20).

5. The culvert backing structure of aeolian sand-fluid soil according to claim 4, characterized in that, The step (20) is set on the left natural gravel (31) or the right natural gravel (32), and it is a compacted soil step.

6. The culvert backing structure of aeolian sand-fluid soil according to claim 5, characterized in that, The step portion of the step (20) slopes toward the left natural gravel (31) or the right natural gravel (32).

7. The culvert backing structure of aeolian sand-fluid soil according to claim 6, characterized in that, The slope of the step portion of the step (20) is 2%.

8. The culvert back structure of aeolian sand-fluid soil according to claim 7, characterized in that, All the outer endpoints of the step (20) section are located on the same straight line, and the intersection point of the extension line of the oblique line formed by the line connecting all the outer endpoints of the step (20) section and the step part of the bottommost step (20) is not less than 100cm from the base plate (10).

9. The culvert backing structure of aeolian sand-fluid soil according to claim 2, characterized in that, The thickness of the filling layer (2) between the cover plate (13) and the roadbed (4) is not less than 60cm.

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